To answer this question, you need to understand the concept of running test sets concurrently on multiple remote hosts and opening a new automatic runner dialog box instance for each test set.
Option A) Auto Runner - This option is incorrect because it does not mention opening a new automatic runner dialog box instance for each test set.
Option B) Automate Runner - This option is incorrect because it does not mention opening a new automatic runner dialog box instance for each test set.
Option C) Automatic Runner - This option is correct because it mentions running test sets concurrently on multiple remote hosts and opening a new automatic runner dialog box instance for each test set.
Option D) Manual Runner - This option is incorrect because it does not mention opening a new automatic runner dialog box instance for each test set.
The correct answer is C) Automatic Runner. This option is correct because it mentions running test sets concurrently on multiple remote hosts and opening a new automatic runner dialog box instance for each test set.